* {
    margin: 0;
    padding: 0;
    list-style: none;
    letter-spacing: 0px;
    color: #767676;
    font-weight: normal;
	font-stretch: normal;
}
body a {
    text-decoration: none;
}
.auto {
    width: 1200px;
    margin: 0 auto;
}
.head {
    height: 100px;
    /* background-color: pink; */
}
.head img {
    float: left;
    margin-top: 24px;
}
.head li {
    float: right;
}
.head li a {
    position: relative;
    display: block;
    width: 110px;
    height: 100px;
    line-height: 100px;
    text-align: center;
    transition: all 0.5s;
}
.head li span {
    position: absolute;
    display: block;
    width: 20px;
    height: 2px;
    background-color: #333;
    margin-top: -35px;
    left: 50%;
    transform: translate(-50%,0);
    opacity: 0;
}
.head a:hover {
    font-size: 30px;
    color: #668aca;
}
.head a:hover span{
    width: 20px;
    margin-top: -30px;
    background-color: #668aca;
    opacity: 1;
}

html {
    scroll-behavior: smooth;
}